html {
    overflow-y: scroll;
}
body {
    text-align: center;
}

.tab-wrap1, .tab-wrap2 {
    margin: 0 auto;
    height: 40px;
    border: 1px solid lightblue;
    border-radius: 10px;
    line-height: 40px;
    margin-top: 100px;
    background: rgba(255, 255, 255, 0.5);
    font-size: 15px;
}

.tab-wrap2 {
    margin-top: 30px;
    text-align: left;
    margin-bottom: 50px;
}

.list {
    position: relative;
    letter-spacing: 0;
    list-style: none;
    display: inline-block;
}

#list2 {
    margin-left: 80px;
}

.list a {
    margin-left: 22px;
    margin-right: 22px;
    margin-bottom: 0px;
    margin-top: 0px;
}

.list li {
    float: left;
    margin-left: 20px;
    margin-top: -1px;
}

.selected {
    color: #ffffff;
    background-color: #1E9FFF;
}

.unselected {
    color: black;
}

li {
    cursor: pointer;
}

.course-list {
    margin-top: 30px;
}

.one-course {
    margin: 0 auto;
    width: 1000px;
    height: 160px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    padding: 20px;
    text-align: left;
    margin-bottom: 20px;
    cursor: pointer;
    display: flex;
}

.course-info-left {
    width: 20%;
    height: 100%;
}

.course-info-center {
    width: 60%;
    height: 100%;
}

.course-info-right {
    width: 20%;
    height: 100%;
    text-align: center;
}

.course-introduce {
    margin-top: 10px;
    padding: 10px;
    display: block;
    overflow: hidden;
    height: 36px;
    text-overflow: ellipsis;
}

.course-img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-top: 10px;
    margin-left: 20px;
}

.course-head-img {
    width: 40px;
    border-radius: 50%;
}

.course-title {
    font-size: 20px;
}
.course-like {
    width: 20px;
}

.course-kind {
    float: right;
    border-radius: 10px;
    padding: 3px;
    padding-left: 10px;
    padding-right: 10px;
    background: rgba(255, 255, 255, 0.4);
}


#new-course {
    float: right;
    margin-right: 90px;
    color: white;
    cursor: pointer;
}

